Chromium (total)

Valley of The Moon Water District

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.677 ppb	10	10	0.360 ppb - 1.60 ppb
2015	0.769 ppb	10	10	0.470 ppb - 1.70 ppb
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	ND	2	0	ND
2019	N/A	0	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-12-08	A4K2003-03A	0.620 ppb
2014-12-08	A4K2003-11A	0.360 ppb
2014-12-08	A4K2003-17A	0.440 ppb
2014-12-08	A4K2003-19A	0.430 ppb
2014-12-08	A4K2003-13A	1.20 ppb
2014-12-08	A4K2003-15A	0.370 ppb
2014-12-08	A4K2003-09A	0.690 ppb
2014-12-17	A4L0927-01A	1.60 ppb
2014-12-17	A4L0927-05A	0.420 ppb
2014-12-17	A4L0927-03A	0.640 ppb
2015-05-19	A5D2590-24A	0.560 ppb
2015-05-19	A5D2590-07A	1.70 ppb
2015-05-19	A5D2590-10A	0.730 ppb
2015-05-19	A5D2590-01A	0.790 ppb
2015-05-19	A5D2590-04A	0.730 ppb
2015-05-19	A5D2590-16A	0.490 ppb
2015-05-19	A5D2590-20A	0.520 ppb
2015-05-19	A5D2590-18A	0.950 ppb
2015-05-19	A5D2590-22A	0.470 ppb
2015-05-19	A5D2590-13A	0.750 ppb
2018-01-11	5810-019-1232	ND
2018-01-11	5810-024-1232	ND